Zeny Desktop Electric Centrifuge Lab (Timer 0-60min) 0-4000 Rpm Cap:20ml X 6 Tube (800-1) 110v Has a maximum capacity of 6 x 20ml and a maximum speed of 4000rpm, making it a great choice for low volume sample separation. Compact and quiet enough to install in an office or classroom as well as in laboratories and medical settings The speed dial ranges from 0-4000rpm and it has a 0 to 60 minute timer. Safe, compact and quiet to use. Ideal for home and educational settings Intended as a worktop centrifuge